Vitamins and Nutrition

Vitamin B2 is the scientific name for riboflavin, which is essential for energy metabolism, cellular function, and maintaining healthy skin and eyes. Thiamine is Vitamin B1, and Niacin is Vitamin B3. Riboflavin is found in dairy products, eggs, leafy greens, and almonds.

Vitamin B12 is a nutrient that helps keep the body's nerve and blood cells healthy and helps make DNA, the genetic material in all cells.

Heart patients are typically advised to limit fat intake, especially saturated and trans fats. High fat consumption can lead to increased cholesterol, arterial blockage, and cardiovascular complications. The other options (vitamins, carbohydrates) are generally part of a balanced diet.

When our skin is exposed to sunlight (specifically UVB radiation), it produces vitamin D through a photochemical reaction. This is why sun exposure is important for maintaining adequate vitamin D levels in the body.

Correct option is (4). 

Vitamin C is chemically known as ascorbic acid, with the molecular formula C₆H₈O₆. It is an essential nutrient for humans and acts as an antioxidant. Niacin is vitamin B3, and thiamine is vitamin B1. The correct answer is B because ascorbic acid is the specific chemical name for vitamin C.

Vitamin D deficiency is directly linked to rickets, a condition that affects bone development in children. Rickets causes bones to become soft and weak, leading to skeletal deformities and growth problems. Vitamin D is essential for calcium absorption and bone mineralization, making it crucial for preventing this condition.

Vitamin B2 is scientifically known as riboflavin. Thiamine is Vitamin B1, and niacin (not 'niacine') is Vitamin B3. Riboflavin is essential for energy production and cellular function.

Carrots are one of the richest sources of vitamin A (as beta-carotene), which the body converts to retinol. Jaggery provides mainly iron and sucrose, Ragi is rich in calcium and iron, and Gooseberries (amla) are excellent for vitamin C, not vitamin A.

Vitamin C significantly enhances non-heme iron absorption by reducing iron to its ferrous (Fe²⁺) form and forming soluble complexes that prevent precipitation. This is why iron-rich foods are best consumed with vitamin C sources like citrus fruits. Vitamins A, B, and D don't have this specific effect on iron absorption.

Citrus fruits like oranges, lemons, and grapefruits are naturally high in Vitamin C (ascorbic acid), which is essential for immune function, collagen synthesis, and wound healing. While other vitamins are present in various fruits, Vitamin C is the defining nutrient characteristic of citrus fruits. Options A, B, D, and E are incorrect as these are not the primary vitamins associated with citrus.

Vitamin E is known as the 'virility vitamin' or 'anti-sterility vitamin' because it plays a crucial role in reproductive health and fertility. Deficiency can lead to reproductive failure.

This option is correct,  because vitamins are not synthesized by the body but have to the supplied in the diet.

Gnotobiotic animals require vitamin B in higher amounts than normal animals. They are free of microbes which can synthesise vitamin B. Thus, they require more vitamin B as compared to normal animals.

The golden oyster mushroom, like other species of oyster mushroom, is a wood-decay fungus. In the wild, P. citrinopileatus most commonly decays hardwoods such as elm.P. citrinopileatus mushrooms are a source of antioxidants. Extracts from P. citrinopileatus have been studied for their antihyperglycemic properties, decreasing blood sugar levels.